Developer Tools Tools

Big-O Notation Visualizer

Interactive plot of O(1) through O(n!) complexity curves with operation count comparison

JSON Formatter

Format and beautify JSON with proper indentation

JSON Validator

Validate JSON syntax and show errors

CSV to JSON Converter

Convert CSV data to JSON format with auto-detection

JSON to CSV Converter

Convert JSON arrays to CSV format with nested object handling

JWT Decoder

Decode JWT tokens and display header and payload

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes

Chmod Calculator

Convert between chmod numeric and symbolic notation

Base64 Encode/Decode

Encode and decode Base64 strings

Hex to Text Decoder

Convert hexadecimal to text and vice versa

Binary Text Decoder

Convert binary to text and text to binary

HTML Entity Encoder/Decoder

Encode and decode HTML entities

ROT13 Decoder

Encode and decode ROT13 cipher text

Morse Code Decoder

Convert morse code to text and vice versa

ASCII Decimal Converter

Convert text to ASCII decimal codes and vice versa

Unicode Codepoint Decoder

Convert Unicode codepoints to characters and vice versa

Crontab Generator

Generate cron expressions visually with next run times

SQL Formatter

Format and beautify SQL with dialect support, keyword case, indent control, and minification. Supports MySQL, PostgreSQL, T-SQL, Oracle, and more

Redirect Generator

Generate 301/302 redirect rules for Apache, Nginx, and more

CIDR Calculator

Calculate CIDR notation and subnet information

Subnet Calculator

Calculate subnet details from IP and mask

Bcrypt Generator

Generate bcrypt password hashes with configurable rounds

YAML Validator

Validate YAML syntax and convert to JSON

Markdown Preview

Live preview of Markdown rendering

Regex Tester

Test regular expressions and see matches

HTML Formatter

Format and beautify HTML with indentation

CSS Formatter

Format CSS with proper indentation

HTML Minifier

Minify HTML by removing comments and whitespace to reduce file size

Cron Schedule Validator

Validate 5-field cron expressions quickly

Simple Regex Tester

Test a regex pattern against sample text

XML Formatter

Format, beautify, and validate XML

Hex to RGB Converter

Convert hex color codes to RGB and HSL

Color Converter

Convert colors between HEX, RGB, HSL, HSV, and CMYK formats

HTTP Status Codes

Reference list of HTTP status codes with descriptions

JSON Diff Viewer

Compare two JSON objects and highlight differences

JWT Encoder

Create and encode JWT tokens with custom claims

Easing Function Explorer

Visualize and compare CSS easing curves interactively

Favicon Generator

Create favicons from text, letters, or colors with multiple sizes for all devices

CSV JSON Converter

Convert CSV to JSON and JSON to CSV

CSV Delimiter Converter

Change CSV delimiters without breaking quoted fields

URL Query Decoder

Parse and decode URL query parameters

URL Query Parser

Parse, edit, and rebuild URL query parameters with live updates

HTTP Header Size Analyzer

Measure total header bytes, per-header size, and oversized header risks

YAML JSON Converter

Convert YAML to JSON and JSON to YAML

HSL to RGB Converter

Convert HSL colors to RGB and hex codes

Unix Permissions Calculator

Convert between symbolic (rwx) and octal unix permissions

IP Address Converter

Convert between IPv4 decimal and binary notation

Color Palette Generator

Generate harmonious color palettes with complementary, analogous, and triadic schemes

Gradient Generator

Create beautiful CSS gradients with live preview and copy-ready code

Glassmorphism Generator

Create frosted glass CSS effects with backdrop blur and live preview

Color Picker

Visual color picker with HEX, RGB, HSL conversion and color harmonies

Box Shadow Generator

Generate CSS box shadows with live preview and layered effects

Border Radius Generator

Create CSS border-radius with visual editor for all corners

Flexbox Playground

Interactive CSS flexbox layout builder with live preview

Base64URL Encoder/Decoder

Encode and decode Base64URL (URL-safe Base64 variant)

Cron Expression Humanizer

Convert cron expressions to human-readable descriptions

MIME Type Lookup

Search MIME types by extension or keyword

HTML to Markdown Converter

Convert HTML to clean Markdown format

JSON to XML Converter

Convert JSON data to XML format

XML to JSON Converter

Convert XML data to JSON format with configurable attribute handling

JSON Size Estimator

Estimate JSON payload size in bytes, KB, and compare raw vs minified

SHA-256 Generator

Generate SHA-256 hashes from text using Web Crypto API

SVG ViewBox Visualizer

Visualize and edit SVG viewBox interactively with live preview

CSS Specificity Calculator

Calculate and compare CSS selector specificity scores

CSS Grid Gap Calculator

Calculate exact grid track sizes from container dimensions, gaps, and padding

Regex Cheatsheet

Interactive regex reference with patterns, examples, and live testing

Base64 Image Decoder

Decode base64 strings to image preview with download

Image to Base64 Converter

Convert image files to base64 encoded strings for embedding

JWT Expiry Checker

Check if a JWT token is expired and see expiration time

QR Code Scanner

Scan and decode QR codes from uploaded images

RGB to Hex Converter

Convert RGB color values to hex codes

RGB to HSL Converter

Convert RGB colors to HSL format

RICE Score Calculator

Prioritize features using Reach, Impact, Confidence, Effort scoring

Log Retention Calculator

Calculate storage needs for log retention policies with compression estimates

SVG Path Length Calculator

Calculate path length for stroke-dasharray animations

IP to Binary Converter

Convert IPv4 addresses to binary and back with octet breakdown

UUID Bulk Generator

Generate large batches of UUID v4 or v7 values with export-ready formatting

Bundle Size Budget Planner

Plan and track your web application's bundle size budget across different chunks

Cookie Size Budget Calculator

Analyze cookie bytes, per-cookie limits, and request header budget usage

cURL to Code Converter

Convert curl commands to Python, JavaScript, Go, PHP, and more

JSON Tree Viewer

Visualize JSON as an interactive collapsible tree with search and path copying

CSS Grid Generator

Build CSS Grid layouts visually with live preview and code export

Dockerfile Generator

Generate production-ready Dockerfiles with best practices for any stack

.gitignore Generator

Generate .gitignore files for any language, framework, and IDE

Placeholder Image Generator

Generate custom placeholder images with specified dimensions, colors, and text

JSON to TypeScript Converter

Generate TypeScript interfaces and types from JSON objects automatically

Nginx Config Generator

Generate nginx server blocks for static sites, reverse proxy, SSL, and redirects

Image Metadata Viewer

View EXIF data and metadata from images - camera settings, GPS coordinates, date taken

Kano Model Mapper

Map features onto Kano categories using functional and dysfunctional questions with scatter plot visualization

Keyboard Tester

Test every key on your keyboard online - verify all keys register correctly

JavaScript Minifier

Minify JavaScript code by removing comments and whitespace to reduce file size

Htpasswd Generator

Generate .htpasswd entries for Apache HTTP basic authentication

.htaccess Generator

Generate .htaccess rules for redirects, caching, compression, and security headers

CSV Editor

Edit, sort, filter, and export CSV data in a spreadsheet view

JSON Flattener

Flatten nested JSON objects into dot-notation key-value pairs

JavaScript Formatter

Format and beautify JavaScript code with customizable indentation

Pixel to Rem Converter

Convert between px and rem units with customizable base font size

Cron Expression Generator

Build and decode cron expressions with a visual editor and next-run preview

IP Subnet Calculator

Calculate network address, broadcast, host range, and wildcard mask for any IPv4 subnet

JSON Path Finder

Paste JSON and click any value to get its JSONPath and dot notation path